[libcxx-commits] [PATCH] D139497: [libc++][Android] Bionic also includes + for NAN

[Ryan Prichard via Phabricator via libcxx-commits]

rprichard added inline comments.


================
Comment at: libcxx/test/std/localization/locale.categories/category.numeric/locale.nm.put/facet.num.put.members/put_long_double.pass.cpp:10736
+#if defined(TEST_HAS_GLIBC) || defined(_WIN32) || \
+        (defined(__BIONIC__) && !defined(_LIBCPP_TESTING_ANDROID_PRINTF_NAN_NO_SIGN))
     std::string pnan_sign = "+";
----------------
Mordante wrote:
> Would this work too?
It ties the expected test output to the build API level of the test, which may not be what we want.

i.e. There are three API levels:
 - the build API level of libc++ itself
 - the build API of the libc++ tests (or the application code)
 - the runtime API level of the device

Currently for the NDK, the libc++ build API is typically 19 or 21, the app build API is typically low-ish (maybe 21/23?), and the runtime API steadily increases as people buy newer devices. It's normal for the build API for application code to be low (to target all the old devices in the wild), and the NDK only packages a single `libc++_{shared.so,static.a}` per CPU architecture.

This use of `__ANDROID_API__` would break the test config in D139147, where the build API for libc++ and the tests is 21 (AndroidNDK.cmake,  llvm-libc++abi-android-ndk.cfg.in), but the runtime API is 33 (Dockerfile.android).



Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D139497/new/

https://reviews.llvm.org/D139497